Kvasny Prum. 1983; 29(7): 157-160 | DOI: 10.18832/kp1983029

Torulopsis ethanolitolerans - the new strain for fooder yeast production from synthetic ethanol.Peer-reviewed article

J. RYBÁŘOVÁ, F. ŠTROS

The yeasts Torulopsis ethanolitolerans were isolated from a mixed production culture. The production culture was periodically transformed in non-sterile fed-batch cultivations in a synthetic medium with ethanol as the sole carbon source. The mixed production culture, originated from a fooder yeast production on sulphite liquors, consisted of Candida utilis (from 80-90 %) and Candida tropicalis (the rest). The new strain differs from Candida utilis and Candida tropicalis in basic taxonomic properties. The strain Torulopsis ethanolitolerans is able to utilize ethanol for a biomass production with a higher yield. The formation and/or accumulation of volatile by products was not observed. Both the biomass composition and the nutrient quality of nitrogen compounds of the new strain are quite sufficient from the standpoint of a fooder yeast quality. The strain Torulopsis ethanolitolerans is thermotolerant, i. e., it permits to perform cultivations with very good results up to the temperature of37 °C.
(In Czech, English summary only)

Keywords: Torulopsis ethanolitolerans, fooder yeast, ethanol

Published: July 1, 1983